import pygame.font
class Button():
    def __init__(self, ai_settings, screen, msg):
        "初始化按钮属性"
        self.screen = screen
        self.screen_rect = screen.get_rect()
        # 设置按钮的尺寸和其他属性
        self.width,self.height = 200,50
        self.button_color = (0,255,0)
        self.text_color = (255,255,255)
        self.font = pygame.font.SysFont(None, 48)
        # 创建按钮的 rect对象，并使其剧中
        self.rect = pygame.Rect(0,0,self.width,self.height)
        self.rect.center = self.screen_rect.center
        # 按钮标签只需要创建一次
        self.prep_msg(msg)
    def prep_msg(self,msg):
        "将mag渲染为图像，并使其在按钮上剧中"
        self.msg_image = self.font.render(msg, True, self.text_color,self.button_color)
        self.msg_image_rect = self.msg_image.get_rect()
        self.msg_image_rect.center = self.rect.center

    def draw_button(self):
#         绘制一个用颜色填充的按钮，再绘制文本
        self.screen.fill(self.button_color, self.rect)
        self.screen.blit(self.msg_image, self.msg_image_rect)

